In order to avoid atmosphere pollution by products of incomplete combustion and evaporations, and also for the purpose of maintenance at high level of overall performance of the engine and fuel consumption reduction modern cars are equipped with systems of decrease in toxicity of the fulfilled gases. The following belongs to their number:

System of operated ventilation of a case (PCV)

Catching system паров fuels (EVAP)

System of a retsirkulyatsiya of the fulfilled gases (EGR)

Oxygen sensor (О2)

Catalytic converter (TWC)

The electronic module of management (RSM) with information sensors

The general descriptions of a design and principle of action of the listed systems are included in Sections of this Chapter, and also procedures of check of their condition and the functioning lying within qualification of the average amateur mechanic.

Before coming to conclusion about refusal of system of decrease in toxicity of the fulfilled gases carefully check serviceability of power supply systems and ignition. Diagnostics of systems of decrease in toxicity some of devices demands use of the special equipment and tools, and also existence of experience of carrying out such works. If during performance of procedures of service there are difficulties or there is a need of use of the special equipment, address for consultation in dealer office. Weakening of fastening or break of electroconducting and hoses therefore these checks should be made first of all (see illustrations below) appears the most widespread cause of failures of systems of decrease in toxicity.

However, told above at all does not mean that repair and service of components of systems of decrease in toxicity represent extremely difficult task. You can own forces, with application of a usual set of the metalwork and adjusting tool to execute many of checks and procedures of routine maintenance of components of system in house conditions.

As on primary service of systems of decrease in toxicity of the fulfilled gases guarantee certificates of firm manufacturer extend, consult about their conditions with the representative of dealer office on car sale.

The scheme of connection of vacuum components of system of decrease in toxicity of the fulfilled gases of models with engines of 4.0 l 1993 and 1994 вып.

The scheme of connection of vacuum components of system of decrease in toxicity of the fulfilled gases of models with engines of 5.2 l 1993 and 1994 вып.

The scheme of connection of vacuum components of system of decrease in toxicity of the fulfilled gases of models with engines of 4.0 l of 1995 вып. (not Californian models)

The scheme of connection of vacuum components of system of decrease in toxicity of the fulfilled gases of models with engines of 4.0 l of 1995 вып. (Californian models)

The scheme of connection of vacuum components of system of decrease in toxicity of the fulfilled gases of models with engines of 5.2 l of 1995 вып.

It is necessary to give special attention to observance of special precautionary measures. It is necessary to notice that illustrations to many systems can differ from state of affairs really taking place on your car a little. Such divergences constantly brought manufacturers of cars of updating within one model speak.

Information label of systems of decrease in toxicity of the fulfilled gases (VECI) is located in an impellent compartment of the car. On a label spetsifikatsionny data and information on settings contain. At performance of procedures of service of system in case of different interpretations always it is necessary to give preference to data of a label of VECI.

The label of VECI is fixed on a support of a radiator and contains information on adjustment of turns of idling, a corner of an advancing of ignition, to an arrangement of knots of systems of decrease in toxicity, laying of vacuum lines etc.

Near VECI label on all models it is fixed шильда with the scheme of connection of vacuum components of system.